Chapter 18 : Rectilinear Figures - Frank Solutions for Class 9 Maths ICSE
Mathematics in ICSE Class 9 is one of the most challenging and trickiest subjects of all. It includes complex topics such as logarithms, expansions, indices and Pythagoras Theorem which are difficult to understand for an average student. TopperLearning provides study materials for ICSE Class 9 Mathematics to make the subject easy and help students to clear all their concepts. Our study materials comprise numerous video lessons, question banks, revision notes and sample papers which help achieve success in the examination.
Chapter 18 - Rectilinear Figures Excercise Ex. 18.1
Is it possible to have a polygon whose sum of interior angles is 780°?
Is it possible to have a polygon whose sum of interior angles is 7 right angles?
Is it possible to have a polygon whose each interior angle is 124°?
Is it possible to have a polygon whose each interior angle is 105°?
A heptagon has three angles equal to 120°, and the other four angles are equal. Find all the angles.
In a polygon, there are 3 right angles and the remaining angles are equal to 165°. Find the number of sides in the polygon.
ABCDE is a pentagon in which AB is parallel to DC and Find angle A.
If the difference between an exterior angle of a regular polygon of 'n' sides and an exterior angle of another regular polygon of '(n + 1)' sides is equal to 4o; find the value of 'n'.
The number of sides of two regular polygons are in the ratio 2 : 3 and their interior angles are in the ratio 9 : 10. Find the number of sides of each polygon.
In a regular pentagon PQRST, PR = QT intersect at N. Find the angle RQT and QNP.
Each exterior angle of a regular polygon is times of its interior angle. Find the number of sides in the polygon.
Each interior angle of a regular polygon is 162°. Another regular polygon has number of sides double the first polygon. Find each interior angle of the second polygon.
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